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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-18819) Vectorization: Optimize IF statement expression evaluation of THEN/ELSE
Date Wed, 28 Feb 2018 03:04:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-18819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matt McCline updated HIVE-18819:
--------------------------------
    Attachment: HIVE-18819.01.patch

> Vectorization: Optimize IF statement expression evaluation of THEN/ELSE
> -----------------------------------------------------------------------
>
>                 Key: HIVE-18819
>                 URL: https://issues.apache.org/jira/browse/HIVE-18819
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 3.0.0
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>         Attachments: HIVE-18819.01.patch
>
>
> Currently, all the rows of a batch are evaluated for the THEN and ELSE expressions even
though only a value from one of them is needed for any particular row.



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